Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value_CVE-2026-34595

{
    "lastseen": "",
    "description": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.70 and 9.7.0-alpha.18, an authenticated user with find class-level permission can bypass the protectedFields class-level permission setting on LiveQuery subscriptions. By sending a subscription with a $or, $and, or $nor operator value as a plain object with numeric keys and a length property (an \"array-like\" object) instead of an array, the protected-field guard is bypassed. The subscription event firing acts as a binary oracle, allowing the attacker to infer whether a protected field matches a given test value. This issue has been patched in versions 8.6.70 and 9.7.0-alpha.18.",
    "published": "2026-03-31T15:10:06.872Z",
    "modified": "2026-03-31T17:22:36.470Z",
    "type": "cve",
    "title": "Parse Server: LiveQuery protected-field guard bypass via array-like logical operator value",
    "source": "GitHub_M",
    "references": "https://github.com/parse-community/parse-server/security/advisories/GHSA-mmg8-87c5-jrc2\nhttps://github.com/parse-community/parse-server/pull/10350\nhttps://github.com/parse-community/parse-server/pull/10351\nhttps://github.com/parse-community/parse-server/commit/f63fd1a3fe0a7c1c5fe809f01b0e04759e8c9b98\nhttps://github.com/parse-community/parse-server/commit/ffad0ec6b971ee0dd9545e1bf1fb34ddebf275c2",
    "id": "CVE-2026-34595",
    "bulletinFamily": "",
    "cwe": [
        "CWE-843"
    ],
    "cvelist": null,
    "sourceData": "parse-community parse-server < 8.6.70\nparse-community parse-server >= 9.0.0, < 9.7.0-alpha.18",
    "sourceHref": "",
    "cvss": {
        "score": 5.3,
        "severity": "MEDIUM",
        "vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
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            "privilegesRequired": "",
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            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "parse-server",
    "version": "< 8.6.70",
    "vendor": "parse-community",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}